Hydrogen Evolution on Supported Incomplete Cubane-type [Mo3S4]4+ Electrocatalysts
| Autor: | Bee Lean Ooi, Klas Andersson, Thomas F. Jaramillo, Jens Ulstrup, Jingdong Zhang, Jacob Lindner Bonde, Ib Chorkendorff |
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| Rok vydání: | 2008 |
| Předmět: |
Gas diffusion electrode
Catalyst support Membrane electrode assembly Analytical chemistry Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Crystallography chemistry.chemical_compound General Energy chemistry X-ray photoelectron spectroscopy Cubane Pyrolytic carbon Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 112:17492-17498 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp802695e |
| Popis: | Electrocatalytic properties of biomimetic supported incomplete cubane-type [Mo3S4]4+ clusters are investigated. The activity toward the hydrogen evolution reaction (HER) is evaluated on both a high surface area gas diffusion electrode in a membrane electrode assembly and on highly orientated pyrolytic graphite (HOPG) supports. Sub-monolayers of the clusters were imaged by means of scanning tunnelling microscopy (STM) prior to electrochemical characterization. This enabled the quantification of the activity on a per cluster basis for the HER and the comparison of the activity with other HER catalysts. We find that the HER activity of the [Mo3S4]4+ is comparable with that of the edge sites of MoS2. The supported [Mo3S4]4+ molecules were also characterized by X-ray photoelectron spectroscopy (XPS), and the observed deterioration in electrocatalytic activity with time was assigned to slow [Mo3S4]4+ cathodic desorption from the catalyst support. |
| Databáze: | OpenAIRE |
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